JPH11229778A - Muck treatment device for tunnel boring machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a muck treatment device for a tunnel boring machine, excellent in safety and working efficiency, capable of treating collapse muck or remaining muck in a compact structure and keeping a wide working space in a pit. SOLUTION: A return conveyor 25 is provided in a tunnel boring machine to return collapse muck or remaining muck 12 to the side of a cutter chamber 22. An conventional idea of carrying collapse muck or remaining muck 12 directly backward is so changed as to return once the muck 12 to the side of the cutter chamber 22 with the return conveyor 25 and then carry it backward from the side of the cutter chamber 22 along an usual carrying route (a primary conveyor 9 or others). The return conveyor 25 requires only a length enough to return the collapse muck or remaining muck 12 to the side of the cutter chamber 22, so that a compact structure can be obtained, a wide working space be kept in a pit and safety be greatly improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shearing apparatus for a tunnel excavator.

[0002]

2. Description of the Related Art As shown in FIG.
Is the main frame 3 provided with the front gripper 2
And a cutter 4 rotatably provided on the main frame 3.
A main beam 5 extending rearward from the main frame 3, a rear gripper 6 movably provided in the main beam 5 in the axial direction, and a propulsion jack 7 for moving the rear gripper 6 with respect to the main beam 5. And a rear support jack 8 provided at the rear end of the main beam 5.

In this tunnel excavator 1, as shown in FIGS. 3 (a) and 3 (b), the rear gripper 6 is expanded to extend the propulsion jack 7 as a reaction force receiving point, and the main frame 3 and the main beam 5 are integrated. Face is excavated by the cutter 4 while moving forward. At this time, the rear support jack 8 is contracted so as not to hinder the movement. Thereafter, as shown in FIG. 3 (c), the rear gripper 6 is set free, the propulsion jack 7 is contracted, and the rear gripper 6 is pulled and reset. At this time, the rear support jack 8 is extended to support the tip of the main beam 5.

In such a tunnel excavator 1, FIG.
As shown in the figure, the earth and sand excavated by the cutter 4 is moved by the primary conveyor 9 provided in the main beam 5 to the cutter room 10.
2 which is transported backward from inside and further provided behind
The next conveyor 11 conveys it to the tunnel position opening side. Here, there are collapsed scraps 12 and leftover scraps 12 in the pit, and the scraps 12 are manually placed on a mini-conveyor 13 provided in the pit, and the primary It was conveyed to the conveyor 9 or the secondary conveyor 11, and was conveyed to the back.

[0005]

However, in the above-described structure, the mini-conveyor 13 is disposed behind the main frame 3 along the front-rear direction of the tunnel, so that the working space in the mine is restricted. Further, it is not preferable in terms of safety to arrange the mini-conveyor 13 as a rotating body in the work space. In addition, the primary conveyor 9 and the secondary conveyor 11 are disposed at relatively high positions in the pit for the purpose of securing a work space therebelow, so that a long mini-conveyor 13 is required due to the inclination (conveyor head). Become. For this reason, the cost increases, and the space occupied by the installation increases, and the work space in the mine is greatly eroded.

SUMMARY OF THE INVENTION The object of the present invention, which has been made in view of the above circumstances, is that it is possible to treat a collapsed scrap or a leftover scrap with a compact structure, a large work space can be secured in a pit, and safety and work efficiency can be secured. Another object of the present invention is to provide a debris disposal device for a tunnel excavator that is excellent in terms of the aspect.

[0007]

SUMMARY OF THE INVENTION To achieve the above object, the present invention provides a tunnel excavator shearing treatment apparatus for returning a collapsed or leftover slip to the cutter chamber side inside the tunnel excavator. It is provided with a conveyor.

[0008] The present invention changes the idea of directly transporting the collapsed or leftover debris to the rear as in the prior art, and once returning the debris to the cutter chamber side by a return conveyor, the normal operation is performed from the cutter chamber side. Is transported rearward by the transport route (primary conveyor). The return conveyor provided by such an idea,
Only the length required to return the collapsed or leftover scrap to the cutter chamber side is required, so that the configuration is compact and a large work space can be secured in the mine, and the safety is significantly improved.

Further, the return conveyor may be movable in the axial direction of the tunnel so that the tip of the return conveyor protrudes into and out of the cutter chamber. In this way, at the time of normal face excavation, the return conveyor is lowered backward and separated from the cutter chamber, and when returning the collapsed or leftover debris to the cutter chamber side, the return conveyor is advanced and inserted into the cutter chamber side. Thus, interference between the return conveyor and the cutter can be reliably avoided.

[0010] A mini excavator may be provided inside the tunnel excavator for placing collapsed or leftover debris on the return conveyor. In this case, the falling excavation, the remaining debris, and the like can be placed on the return conveyor by the mini-excavator without the manual operation of the operator, so that the operation efficiency is improved.

[0011] The mini excavator may be provided on a hoist that moves along the axial direction of the tunnel to transport equipment such as a shoring. In this case, the hoist for transporting the equipment also serves as the moving means of the mini-excavator, so that the moving means dedicated to the mini-excavator becomes unnecessary and the cost is reduced. In addition, if the hoist is moved rearward, the mini excavator can also perform the rearward shear processing.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1, this tunnel excavator 1
The main frame 3 is provided with a cutter 4 for excavating a face to be rotatable. As shown in FIG. 2, the cutter 4 includes a face facing portion 4 a formed in a substantially disk shape,
It comprises a side surface portion 4b gradually reduced in diameter rearward from the face facing portion 4a, and a ring plate-shaped rear surface portion 4c attached to the side surface portion 4b. A large-diameter external gear 15 supported by a bearing 14 is provided on the rear surface portion 4 c, and the external gear 15 is meshed with a pinion 17 of a drive motor 16. A plurality of drive motors 16 are provided at predetermined intervals in the circumferential direction of the external gear 15. A roller bit 1 for substantially excavating the face is provided on the face facing portion 4 a of the cutter 4.
8 are provided.

FIGS. 3 (a), 3 (b) and 3 (c) show the main frame 3.
As shown in FIG. 2, a front gripper 2 is provided for expanding and contracting in the radial direction to press and release the inner wall of the tunnel, and a main beam 5 extending rearward is provided. The main beam 5 is provided with a rear gripper 6 slidable in the axial direction. The rear gripper 6 expands and contracts in the front and rear directions in FIG. 3 and presses and separates the inner wall of the tunnel. A propulsion jack 7 is provided between the rear gripper 6 and the main beam 5. A rear support jack 8 is provided at the rear end of the main beam 5.

In this tunnel excavator 1, as shown in FIGS. 3 (a) and 3 (b), the rear gripper 6 is expanded to extend the propulsion jack 7 as a reaction force receiving point, and the main frame 3 and the main beam 5 are integrated. Face is excavated by the cutter 4 while moving forward. At this time, the rear support jack 8 is contracted so as not to hinder the movement. Then, FIG. 3 (c)
As shown in (5), the rear gripper 6 is set free, the propulsion jack 7 is contracted, and the rear gripper 6 is pulled to reset. At this time, the rear support jack 8 is extended to support the tip of the main beam 5.

As shown in FIG. 1, a support 19 is attached to the inner peripheral surface of the tunnel formed by excavation. The shoring 19 is conveyed from the entrance side of the tunnel to the back side by the hoist 20 and attached to the inner peripheral surface of the tunnel by an unillustrated erector attached to the main beam 5. The hoist 20 engages with a hoist rail 21 attached to a lower portion of the main beam 5 and runs by itself, has a hanging hook or a conveyer table (not shown), and
In addition to transporting various equipment.

During the excavation, the earth and sand excavated by the cutter 4 is taken into a cutter chamber 22 formed inside the cutter 4 through a not-shown earth and sand inlet formed in the face facing portion 4a of the cutter 4. It is. Inside the cutter 4, a plurality of frying plates 23 for frying earth and sand are provided at predetermined intervals in the circumferential direction. The number of the frying plates 23 may be three or more instead of two as shown in FIG. The scraped earth and sand is received by a hopper 24 provided on the main frame 3. The earth and sand in the hopper 24 is transported rearward by the primary belt conveyor 9 provided in the main beam 5 and further transported to the secondary belt conveyor 11 behind.

Now, in the tunnel excavator 1,
Support 19 on the inner peripheral surface of the tunnel excavated by cutter 4
Is attached, there is a possibility that the collapsed debris 12 may be generated, and the collapsed debris 12 may accumulate at the bottom of the tunnel. Further, all the earth and sand excavated by the cutter 4 cannot be discharged by the primary belt conveyor 9, and a residue 12 may occur, and the residue 12 may accumulate at the bottom of the tunnel. These shears 12
The soil is discharged by a shearing treatment device described below.

The debris processing apparatus has a return conveyor (belt conveyor) 25 for returning the collapsed debris 12 and the remaining debris 12 to the cutter chamber 22 side. The return conveyor 25 is provided at the bottom (inverted portion) of the main frame 3, and is movable in the axial direction of the tunnel such that the tip end 25 a thereof protrudes and retracts forward from the main frame 3. That is, the return conveyor 2
5 is a hole (manhole or the like) formed at the bottom of the main frame 3 formed so as to separate the face side from the inside of the pit.
Is inserted and supported. Return conveyor 25
May be moved by a hydraulic cylinder or the like, or manually by an operator.

The collapsed and leftover scraps 12 transported forward by the return conveyor 25 form a space 27 defined by a front surface of the main frame 3, a hood 26 attached to the main frame 3, and a cutter side surface 4b.
It is once excavated inside. Gap 12 removed in space 27
2 is scooped by a bucket 28 provided on the side surface portion 4b with the rotation of the cutter 4 and moved into the cutter chamber 22 as shown in FIG.

The bucket 28 is formed so as to cover an opening 29 formed to communicate with the inside and outside of the cutter side surface 4b. The bucket 28 is provided with the cutter side portion 4.
b are arranged at predetermined intervals in the circumferential direction. In addition, instead of the bucket 28, the cutter side portion 4
b, a larger opening is formed, and the tip 25a of the return conveyor 25 is directly inserted into the opening to transfer the collapsed debris 12 and the remaining debris 12 in the pit directly into the cutter chamber 22. Good.

The hoist 20 is provided with a mini-excavator 30 for placing the collapsed and leftover debris 12 on the return conveyor 25. Mini excavator 30
Is composed of a multi-joint arm 30a such as a yumbo attached to the hoist 20 and a bucket 30b provided at the tip thereof for scooping the slip 12. In addition, a roof portion 31 that supports the top end of the inner wall of the tunnel is provided on an upper portion of the main frame 3.

The operation of the shear processing apparatus having the above configuration will be described. As shown in FIG. 1, when discharging the collapsed scrap 12 and the remaining scrap 12 existing at the bottom of the tunnel, first, the rotation of the cutter 4 is stopped. Then, the return conveyor 25 is moved forward, and its front end portion 25 a is projected into the space 27 in front of the main frame 3. Then, while driving the return conveyor 25, the miniature shovel 30 of the hoist 20 scoops the slip 12 and places it on the return conveyor 25. Thus, the slip 12 placed on the return conveyor 25 is temporarily removed from the space 2.
7 is transferred.

Thereafter, the return conveyor 25 is moved rearward, and its tip 25a is pulled out of the space 27. Then, the cutter 4 is rotated and the primary belt conveyor 9 is driven. Then, the shears 12 in the space 27 are scooped by a bucket 28 provided on the cutter side surface 4b, and are moved into the cutter chamber 22 inside the bucket 28. Then, the slip 12 in the cutter chamber 22 is scraped up by a scraping plate 23 formed inside the cutter 4, and the hopper 2
Moved to 4. And the earth and sand in the hopper 24
It is transported rearward by the next belt conveyor 9 and further transported rearward by the secondary belt conveyor 11.

As described above, the above-mentioned waste treatment apparatus changes the idea of directly transporting the collapsed debris 12 and the leftover debris 12 in the mine as in the conventional type shown in FIG.
After the slip 12 is once returned to the cutter chamber 22 side (the space 27 in the present embodiment) by the return conveyor 25, it is transported rearward from the cutter chamber 22 side by a normal transport route (the primary belt conveyor 9). Things.
The return conveyor 2 provided by such an idea.
5 is short enough to return the collapsed scrap 12 and the remaining scrap 12 to the cutter chamber 22 side, so that it can be short, and can be arranged horizontally at the bottom of the tunnel with almost no need for a conveyor lift. Therefore, the configuration becomes compact, and a wide working space can be secured in the mine.

Conversely, since the space occupied by the rotating body (return conveyor 25) existing in the working space can be reduced, the safety is also significantly improved. That is, in the conventional type shown in FIG. 4, a mini-conveyor 13 (rotating body) that is long and has a large head so as to cross the work space
In contrast, the present embodiment shown in FIG. 1 requires only a horizontal return conveyor 25 having a short head and a small head, so that not only a large work space can be secured, but also the safety is remarkably improved.

Since the return conveyor 25 is movable in the axial direction of the tunnel so that the tip end 25a of the return conveyor 25 projects into and out of the space 27, the return conveyor 25 is lowered rearward when a normal cutter 4 excavates a face. Away from the cutter 4 and the collapsed scrap 12 and the remaining scrap 1
Conveyor 2 when returning to the cutter room 22 side
By advancing 5 and inserting it into space 27, interference between return conveyor 25 and cutter 4 can be reliably avoided. In the present embodiment, since the return conveyor 25 is moved forward while the rotation of the cutter 4 is stopped, the return conveyor 25 does not interfere with the rotating cutter 4.

If the clearance between the advanced return conveyor 25 and the cutter 4 can be sufficiently ensured, the cutter 4 is rotated while driving the return conveyor 25 at the advanced position, and the return conveyor 25 shifts the bottom of the tunnel. The transfer of the slip 12 to the space 27 and the transfer of the shears 12 in the space 27 into the cutter chamber 22 by the bucket 28 provided on the cutter 4 may be performed simultaneously. Thus, the transfer of the shears 12 can be performed efficiently. In addition, the return conveyor 25 may be fixed to the main frame 3 if the interference between the return conveyor 25 and the cutter 4 can be reliably avoided.

Further, the above-mentioned collapsed scrap 12 and the remaining scrap 12
Excavator 3 for placing the product on the return conveyor 25
Since 0 is provided, the collapsed scrap 12 and the remaining scrap 12 can be placed on the return conveyor 25 by the mini excavator 30 without manual work of the worker, and the work efficiency is improved. Note that the shift 12 may be placed on the return conveyor 25 manually by an operator without providing the mini excavator 30.

In addition, the mini excavator 30 is used for supporting 1
9 is provided on the hoist 20 which moves along the axial direction of the tunnel to transport the equipment such as 9, so that the hoist 20 for transporting the equipment also serves as the moving means of the mini excavator 30, and is used exclusively for the mini excavator 30. This eliminates the need for transportation means and reduces costs. It is needless to say that a moving means dedicated to the mini excavator 30 may be provided.

When the hoist 20 is moved rearward along the rails 21, the mini excavator 30 moves the hoist 20 further rearward (a slip that has been dropped from the connecting portion between the primary belt conveyor 9 and the secondary belt conveyor 11). Etc.) is also possible.

[0032]

As described above, according to the apparatus for treating a slippage of a tunnel excavator according to the present invention, it is possible to treat a collapsed slippage, a leftover slippage, etc. with a compact configuration, and a wide working space can be secured in a pit. Safety and work efficiency are significantly improved.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing an outline of a shearing treatment apparatus for a tunnel excavator according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a cutter part of a shearing treatment device of the tunnel excavator.

FIG. 3 is an explanatory diagram showing how a tunnel excavator excavates.

FIG. 4 is a side sectional view showing an outline of a conventional shear processing apparatus for a tunnel excavator.

[Explanation of symbols]

 12 Collapsed or leftover scrap 20 Hoist 22 Cutter chamber 25 Return conveyor 25a Tip 30 Mini excavator

Claims (4)

[Claims] 1. A debris treatment device for a tunnel excavator, wherein a return conveyor is provided inside the tunnel excavator for returning collapsed or leftover debris to the cutter chamber side. 2. The apparatus according to claim 1, wherein the return conveyor is movable in the axial direction of the tunnel such that the tip of the return conveyor protrudes and retracts toward the cutter chamber. 3. The tunnel excavator debris treatment apparatus according to claim 2, wherein a mini excavator for placing collapsed debris or leftover debris on the return conveyor is provided inside the tunnel excavator. 4. The apparatus according to claim 3, wherein the mini excavator is provided on a hoist that moves along the axial direction of the tunnel to transport equipment such as a shoring.